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Pension and Retiree Medical Benefits - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 23, 2024 | Mar. 25, 2023
Defined Benefit Plan Disclosure [Line Items] |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | $ (11) | $ 4
Domestic Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 150 | 125
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 33 | 25
Foreign Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 27 | 17
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 1 | $ 0

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